22344643 has 4 divisors (see below), whose sum is σ = 22650808. Its totient is φ = 22038480.

The previous prime is 22344617. The next prime is 22344653. The reversal of 22344643 is 34644322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34644322 = 2 ⋅17322161.

It is a cyclic number.

It is not a de Polignac number, because 22344643 - 2⁵ = 22344611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22344653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152973 + ... + 153118.

It is an arithmetic number, because the mean of its divisors is an integer number (5662702).

Almost surely, 2^22344643 is an apocalyptic number.

22344643 is a deficient number, since it is larger than the sum of its proper divisors (306165).

22344643 is an equidigital number, since it uses as much as digits as its factorization.

22344643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306164.

The product of its digits is 13824, while the sum is 28.

The square root of 22344643 is about 4727.0120583726. The cubic root of 22344643 is about 281.6595450428.

Adding to 22344643 its reverse (34644322), we get a palindrome (56988965).

The spelling of 22344643 in words is "twenty-two million, three hundred forty-four thousand, six hundred forty-three".